#!/bin/bash
#
# Copyright (C) 2018 Nikos Mavrogiannopoulos
#
# This file is part of ocserv.
#
# ocserv is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at
# your option) any later version.
#
# ocserv is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

# This tests operation/traffic under compression (lzs or lz4).

OCCTL="${OCCTL:-occtl}"
SERV="${OCSERV:-ocserv}"
srcdir=${srcdir:-.}
PORT=4568
PIDFILE=ocserv-pid.$$.tmp
CLIPID=oc-pid.$$.tmp
PATH=${PATH}:/usr/sbin
IP=$(which ip)
OUTFILE=traffic.$$.tmp

. `dirname $0`/common.sh

if test -z "${IP}";then
	echo "no IP tool is present"
	exit 77
fi

if test "$(id -u)" != "0";then
	echo "This test must be run as root"
	exit 77
fi

echo "Testing ocserv connection with DTLS-PSK..."

function finish {
  set +e
  echo " * Cleaning up..."
  test -n "${PID}" && kill ${PID} >/dev/null 2>&1
  test -n "${PIDFILE}" && rm -f ${PIDFILE} >/dev/null 2>&1
  test -n "${CLIPID}" && kill $(cat ${CLIPID}) >/dev/null 2>&1
  test -n "${CLIPID}" && rm -f ${CLIPID} >/dev/null 2>&1
  test -n "${CONFIG}" && rm -f ${CONFIG} >/dev/null 2>&1
  rm -f ${OUTFILE} 2>&1
}
trap finish EXIT

# server address
ADDRESS=10.201.2.1
CLI_ADDRESS=10.201.1.1
VPNNET=192.168.2.0/24
VPNADDR=192.168.2.1
VPNNET6=fd91:6d87:7341:dc6a::/112
VPNADDR6=fd91:6d87:7341:dc6a::1
USERNAME=test
TUNDEV=oc-$$-tun0

. `dirname $0`/ns.sh

# Run servers
update_config test-dtls-psk.config
if test "$VERBOSE" = 1;then
DEBUG="-d 3"
fi

${CMDNS2} ${SERV} -p ${PIDFILE} -f -c ${CONFIG} ${DEBUG} & PID=$!

sleep 4

# Run clients
echo " * Getting cookie from ${ADDRESS}:${PORT}..."
( echo "test" | ${CMDNS1} ${OPENCONNECT} ${ADDRESS}:${PORT} -u ${USERNAME} --servercert=d66b507ae074d03b02eafca40d35f87dd81049d3 --cookieonly )
if test $? != 0;then
	echo "Could not get cookie from server"
	exit 1
fi

echo " * Connecting to ${ADDRESS}:${PORT}..."
( echo "test" | ${CMDNS1} ${OPENCONNECT} -Q16 --interface ${TUNDEV} --dtls-ciphers=PSK-NEGOTIATE ${ADDRESS}:${PORT} -u ${USERNAME} --servercert=d66b507ae074d03b02eafca40d35f87dd81049d3 -s ${srcdir}/scripts/vpnc-script --pid-file=${CLIPID} --passwd-on-stdin -b )
if test $? != 0;then
	echo "Could not connect to server"
	exit 1
fi

set -e

echo " * wait for ${TUNDEV}"

TIMEOUT=10
while ! ${CMDNS1} ip addr list dev ${TUNDEV} &>/dev/null; do
    TIMEOUT=$(($TIMEOUT - 1))
    if [ $TIMEOUT -eq 0 ]; then
	echo "Timed out waiting for ${TUNDEV}"
	exit 1
    fi
    sleep 1
done
sleep 1 # XX: CI needs additional delay here

TIMEOUT=10
while ! ${CMDNS2} ip addr list|grep vpns >/dev/null; do
    TIMEOUT=$(($TIMEOUT - 1))
    if [ $TIMEOUT -eq 0 ]; then
	echo "Timed out waiting for vpns"
	exit 1
    fi
    sleep 1
done

echo " * add routes"

${CMDNS1} ip route add ${VPNADDR} dev ${TUNDEV}
${CMDNS1} ip -6 route add ${VPNADDR6} dev ${TUNDEV}

echo " * ping remote address"

${CMDNS2} nuttcp -1

${CMDNS1} ping -c 3 ${VPNADDR}

sleep 2

echo " * Transmitting with nuttcp"

${CMDNS1} nuttcp -T 6 -t ${VPNADDR}

# IPv6

${CMDNS2} nuttcp -1

${CMDNS1} ping -6 -c 3 ${VPNADDR6}

echo " * Receiving with nuttcp"

${CMDNS1} nuttcp -T 6 -r ${VPNADDR}

set +e

${OCCTL} -s ${OCCTL_SOCKET} show users|grep ${USERNAME}
if test $? != 0;then
	echo "occtl didn't find connected user!"
	exit 1
fi

${OCCTL} -s ${OCCTL_SOCKET} show user ${USERNAME} >${OUTFILE}
if test $? != 0;then
	${OCCTL} -s ${OCCTL_SOCKET} show user ${USERNAME}
	echo "occtl didn't find connected user!"
	exit 1
fi

grep "Username: ${USERNAME}" ${OUTFILE}
if test $? != 0;then
	${OCCTL} -s ${OCCTL_SOCKET} show user ${USERNAME}
	echo "occtl show user didn't find connected user!"
	exit 1
fi

grep "DTLS cipher: (DTLS1.2)-(PSK)" ${OUTFILE}
if test $? != 0;then
	${OCCTL} -s ${OCCTL_SOCKET} show user ${USERNAME}
	echo "occtl show user didn't show DTLS-PSK ciphersuite!"
	exit 1
fi

grep ${CLI_ADDRESS} ${OUTFILE}
if test $? != 0;then
	${OCCTL} -s ${OCCTL_SOCKET} show user ${USERNAME}
	echo "occtl show user didn't find client address!"
	exit 1
fi

echo " * ping remote address after reconnect"

kill -USR2 $(cat ${CLIPID})

${CMDNS2} nuttcp -1

${CMDNS1} ping -c 3 ${VPNADDR}

sleep 2

exit 0
